Perhaps you should try some spelling variations:
thanh ca » thanh cha, thanh cac, thanh ha
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
tuc gia » tac gia, duc gia, toc gia
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ma hoi. hieu va cac tuc gia thanh ca ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu va cac tuc gia thanh ca ((cuu tre) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu va cac tuc gia thanh ca ((cuu tre) or (cua tre))*.